Starting and stopping motion.



E-. C. NORTHRUP.

STARTING AND STOPPING MOTION? APPLICATION FILED MAY 23. 1915.

1,244,636., Patented Oct. 30, 19,17.

2 SHEETS SHEET 1. v

64 l-V/fivliShlii z f; 52 INVENTOR; EIC. NUR'THRUF.,

E. c. NORTHRUP. STARTING AND STOPPING MOT|0N. APPLICATION FILED MAY 28. I915.

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To all-whom itmay conce n; i

, B it known. that C. Nannies? a citi en of he 'UnitedS teS, r iding at San Francisco, in the coun y f SauF anisco, State of Calif rnia, har in en ed a new and useful Starting and Stopping Motion, of which the followingzisliax n e iieaion in such full and clea terms as wil en.- able those skillediintheartto eonstrue and use the same. i i 1 i This invention relates e start 1ig1a stopping apparatus. or machines; which carry through a given. set of. op ati ns intermittently, and its use the present instance is in connection with box nailing machinery, in which given series of nails-is driven, whereupon theinachiue is st pped and not again setin motionuntil the operator places thelbox in position to nailanother side or bottom thereon.

An object of the invention isto provide a device which will give the clutch used to start the machine a very rapid engaging throw, thereby starting the machine quickly, While it is likewise given a very rapid disengaging .throW following which aibrake is applied to the machine driving Sha t 1 116 26- by promptly bringing it to rest after the givenoperations have been carriedout. ,1

Anembodiment of the invention is shown in the drawing in which the same reference numeral is applied to thesame portion throughout but 1am aware that there may I, o I- be many modlficatlonsthereof.

Figure l is a side elevation of the machine, a portion ofthe frame of jihe .ma

' of the apparatusshown in Figs. land 2, and

Fig. 4: is a verticalisectional view along the center line. of the clutch shaft.

The numeral 1 represents the base of the machine, 2 a portion of the frame lofsome machine to which this starting and stopping -motion may be applied, 3 represents a Standwith, but which forms no part of the present i in ent on p The shaft 4: is iprovided'with jaaaeiiig pi ion hand with a brake wheel-7. Mountspecification of Letters Patent. 0015. 30, 1917. zi lieationfilearviaycs,1915. Serial No. 36,983. i I I i i i ed lo sely. on the; shaft 4 is a belt pulley. s, y 7

I pu ley having a suitable grease cu i ltd qarryingazpinion 10 on its-hub for idr r ngany suitab e apparatuswhich it ay be desired to connect therewithi continue ously. The pulley 8 is held in placeby means I of. collars 11 12 which are s ita ly pin ed o the shaf s Thci'shaf i is provided i'w-ith a over which key is slidable clutch m -v he .li iysaid clutch having shoes 15., 116, .17, 8 which. engage the clutch fla ge .19 ionithe pul ey 8- The clutch shoes are s itably he 41.11 pl eeon the eluftchhy'nieans of-bo ts 22 and the clutch member -14: is vheld in engagement w h h fl nge l -by pressurefrou a heavy spring 28., whichspring bears on a w her 24 prevented from movingflongi uidin ly by means o th pin Bel w the s aft on he base f hemae in the e is a bra ket 26 which form apivotal s ppor for an 27, said ha ing a r wi h lugs. .28, 2 whiohengagea gro'o e3 in th islidable .olutch member $11 he object be n to p vide means wher y the cl tch her may, be fo cib y diseng ged from th vpu ey at th given end of the sequ e vo operations .i The gear 6 is inmesh with large gea on ashaiit ca ried by j u nalbea g "ill the m in standa d of t e machine 2 and $2" in mesh w h a bevel gear as i one i e t a 'illh s shaft has bevel gear 3. thereo shaft 35, a suitable bracket 36 connected wi h the m in iranle the mac ine affo dng a suppor for the lower ei d fl he sha t The haii' 3 ha crank pins.3v7,;3 conne ted with the 1 ks a0 for; t e per tion of the upper portion of the machine, I The arm 27 is provided vwith a lug 41, which lug is engaged by a roller 42 on the i i-T, s i am b i pi o on th po tion ii of the bracket 26. The arm egis I I also. provided with a o ereii whi h rolle o p siti ned a a to enable the op t Ito pull he roller e2 o t of engag me t with Jithe ll th reby all wing :theslidable 91111 91 member l Qfi ili pzi g to engagement with g the flange 19 to start the machine, and as soon as the machine has started the cam s17 be ins to, rotate wlth the shaft 32 and as soon as it has made one complete rotation it strikes'the roller 45 and disengages the slidable clutch member from the flange 19, while at the same time the crank 48 carrying the pin 87 strikes the roller 49' on the lever50 and thereby causes, the brake arm 51to engage'the brake wheel 7 stopping the ma" chine. i v a The brake comprises the lever 51 pivoted on the standard 5 at 52 and is provided with a lug'53 to prevent the brake lever from of operations of the machine has beeneomplet'ed. I v

' The machine is started by the operator placing his foot upon the pedal 60, said pedal having an arm 61 rigidly connected to the shaft 62, which shaft is journa'led in lugs 63, 64: extending from the front of the base of the machine. This shaft has a link 65 thereon which is pivotally connected with the link 66, saidlink being connected at its opposite end to the lever 43.

In operation the pulley 8 runs continuously while the machine is started by the op- 'erator depressing the foot pedal 60. This pulls the roller 42 out of engagement with the arm 41, the cam 47 being low enough to allow said roller 4C2 to become disengaged from the lug 41, whereupon the spring 23 forces the slidable clutch member into engagement with the flange 19 and the machine "begins to turn over and will continue to turn until the cam 47 makes one complete revolu "tion, whereupon it pushes'the roller-l5out of its way and causes the disengagement of the clutch member 11 from the flange 19, and as soon as the crank 48 turns to the position shown in Fig. 1 the brake will be caused toengage the wheel 7 and the machine will be stopped, although the pulley 8 continues to rotate.

Having thus described my invention what I claimas new and desire to secure by Letters Patent of the United States, is as follows, modifications within the scope of the claims being expressly reserved: 7

1. A starting and stopping motion comprising a continuously running clutch member, an intermittently driven shaft, a clutch clutch members, a cam' adapted to push said lever forward to disengage the two-clutch the clutch members in engagement, a lever to hold the clutch members out of engagement, a pedal for moving said lever-out'of engagement with the clutch member and permitting the clutch'members to contact one with the other, a cam for causing the disengagement' 'of the clutch members at the-end of one' complete revolution of the shaft carrying said cam,ra brake, and means whereby the intermittently driven shaft will apply said brake at the end of one completerevo- I lution of the cam shaft. 7 p 7 8. startingend stopping-motion for machines COHIPIISIIlg a frame, "an intermittently driven shaft carried thereby, a continuously running memberon said shaft, a

said slidable clutch member to engage the running member, a lever for holding the slidable clutch member out of engagement with the running clutch member, a second lever "slidable clutch member, a spring to cause 71 for shifting the first mentioned lever, a cam for shifting the latter lever, a shaft to which said cam is secured, a foot pedal for starting the machine, a brake for stopping the machine when the cam shaft has turned precisely one revolution and means whereby the intermittently driven shaft will apply said brake at a predetermined place after each movement, i

4:. A starting and stopping motion for machines comprising a frame, a shaft carried thereby, a continuously running member on said shaft, a slidable'clutch member, a springto cause said slidable clutch member to engage the runnin member, a lever which engages a projection on the first lever to hold the slidable clutch member in a given position, a revoluble shaft, arcam thereon adapted to engage the second roller to disengage the slidable clutch member, a foot pedal connected with the second member for starting the machine, and a brake for stopping it when the cam shaft has turned one revolution. 1

5.'A starting and stopping motion for machines comprising a frame, a shaft carried thereby, a continuously running mem- "for holding the slidable c utch member out i" ,of engagement with the running member, a second member carrying two rollers, one of ber thereon, a slidable clutch member, .a

spring to cause the slidable clutch member to engage the running member, a lever for shifting the slidable clutch member and having a lateral projection thereon, a second lever carrying two rollers, one to engage the latter projection to disengage the slidable clutch member from the running member, a second shaft, a cam on the latter shaft adapted to engage the second roller to cause the disengagement of the clutch members, a brake wheel, a lever pivoted to the frame, a crank on the cam shaft, and a spring pressed arm with which said crank is adapted to engage "my hand this 18th day of May, A. D. 1915,

in the presence of the two subscribed wit- 15 nesses. o ELMER G. NORTHRUP. Witnesses: o

C. P; GRE IN, L. H. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,.

Washington, I). 0. 

